Pattern mechanism for twist-lace machines



Nov. ,1, 1927 1,647,798

5. T. HALL.

PATTERN MECHANISM FOR TWIST LACE MACHINES Filed Feb. 1925 v 2 Sheets-Sheet 1 UW I 1H I v 1 I ill ,l Y m T llk FIGA. 45 M in.

Nov. 1, 1927.- 1,647,798

. s, T. HALL PATTERN MECHANISM FOR TWIST LACE MACHINES Filed Feb. 6, i925 251199tS-5h96t 2 Patented Nov. 1, 1927.

Es, PATENT 1 OFFICE.

UNITED sfrA-"r SAMUEL TOMEINSON' HALL, or wris'r nninoronn, Err drawn. nssm'non 'ro HENRY GAMBLE, or CLAR-EMONT, ENGLAND.

PATTERN MECHANISM roe. TWIST-LACE MACHINES;

Application filed February e, 1925, Serial No.

This invention comprises improvements in or relating to twist lace machines and fabrics: produced thereon and relates to the class of twist lace machines known as plain net curtain lace machines, the object of the invention being to considerably widen the field of" utility of plain net machines, by the pro.- SlSlOll of simple and, effective means which will enable such machines to produce patterned fabrics.

The principal featureof the invention consists in the production of apatterned fab ric on a. plain net machine by the introduction during the customary operation of the machine of one or more threads in addition to those employed. in making the net.

Another feature of the invention consists in a plain net machine having, in addition to the usual guide bars for'the warp threads which twist with the bobbin threads in the production of the net, one or moreguide bars for a patterning thread or threads, said additional bar or bars being operated so as to shog the patterning thread or threads lengthwise of the machine in both directions.

A further feature consists in the provision of simple and easily operable mechanism for effecting and ensuring a particularly rapid shogging movement of the patterning thread or threads so as to prevent said thread or threads from fouling the bobbin carriages during the movement of said carriages backwards and forwards across the machine well. 7

For the purpose of more fully describing the nature of this invention, reference will now be made to the accompanying drawings, wherein Fig. 1 illustrates in elevation mechanism adapted to be installed upon a plain net machine. for producing patterned fabrics.

Fig. 2 is a plan view on line AA of Figure 1.. I

Fig. 3 is a plan view on an enlarged scale of a portion of the mechanism shown at the upper part of Figure 1.

Fig. dis a view of the machine well showing the position of the additional thread guide bars 5' is a perspective view of the cam wheel 4% and associated parts 1 Fig. 6 is a perspective view ofa section of the wheel shown in Fig. 5, and l yger 7,360, and in Great Iii-item February 7, 1924'.

scale than that View, illustrating the operation of the machine. a I I In one method of carrying out the invention, upon the upright motion. shaft 1, usu-' ally provided at the. end of a plain. net ma,- chine off, the well known type, and. prefer ably beneath the customary pattern .or mo tien, wheels 2 on said shaft which are formed with operating cams or-knobs 21, is. mounted a gearwheel 3 which meshes. with anomparatively larger gear wheel 4 mounted upon a second vertical shaftv 5.. On the upper face of the larger gear wheel 4. at or near the circumferential edge. of same one or more fiat,- topped steps 6 are cut or formed, the rises 6c of said steps being inclined, and in connection with each of said rises a pivoted gray-zit member 7 is provided. Each of said gravity members 7 comprises a short arm lying alongside, the stepped rim or cam. 6. and pivoted at 7 to abracket or other suitable support 19., its opposite or free end extending within a slot 7 in the wheel 4;, the upper edge or face of the arm being flat while the lo-wer face is formed with adovvnwardly projecting nose 7 at that part; farthest removed from the pivot extending through the opening 7 I hen in the normal position the downwardly projecting nose 7 of each gravity arm. 7,- whicl1 nose is rounded or bevelled p1 jects a short distance below the under face of the wheel 4- carrying said arm,while the upper face of the arm inclines down from the level of the top flat face of the step 6 with which the arm is incorporated toa position coinciding with the bottom of the inclined rise 6* of said step.

. Assembled upon the upright motion shaft 1 beneath'the, smaller gear wheel 3 of the before-mentioned intermeshing gear wheels is a camwheel 8 having one or more comparajtively sharp risesS on its upper face, which rise or rises. is or are adapted during operation to engagewith the downwardly projecting nose or noses 7 of the gravity arm or arms. 7 in the large gear wheel 4 so as to lift said arm or arms for the purpose hereinafter more fully described.

Adapted to bearby gravity, or by the combination of gravity and the efli'ort of a suitable spring 9, upon the upper face of. the larger stepped, gear wheel at is the free end of an 211111.10. which is pivoted at its. other end upon a horizontally disposed spindle or pivot 11,1nounted in a suitable bracket, not shown, secured to any convenient fixed part of the frame of the machine, that end heating upon the stepped wheel being preferably cranked or provided with a downwardly projecting nose 12. Suitably connected to this arm, advantageously near its free end, is an upwardly extending rod 13, the upper end or part of which rod is formed with a plurallty of comparatively small inclined topped steps 14. This stepped portion of the rod is adapted to pass through a slot at the end of the one arm 15 of a bell-crank lever 15, the second arm 15 of said lever having connected thereto one or more rods 16 to which are connected one or more thread guide bars 17 for carrying the additional or patterning threads, which bar or bars extend lengthwise beneath the well of the machine Figure 4 and between the guides 22 for the usual carriages 23 carrying the bobbins for the threads that twist with the warp threads, such as are usually found in twist lace machines. Pivotally connected to the bellcrank lever 15 is an arm 18 with bevelled nose 18 at its free end, said nose bearing on a motion wheel 2, it being understood that an additional motion wheel is furnished in connection with each extra guide bar. The stepped portion of the rod 13 is wedged in between the one face of the slot 15 and the end of the pivoted arm 18.

In operation, as the upright motion shaft 1 rotates, the small gear wheel 3 mounted thereon and the cam wheel 8 beneath said small gear are rotated'in the same direction, and the comparatively large stepped wheel 4 carrying the gravity members 7 is simultaneously rotated in an opposite direction. The gravity members 7 and steps 6 on the larger gear wheel 4 and the rise or rises 8 on the cam wheel 8 are so positioned relative to one another that immediately the nose portion 12 of the pivoted arm 10 which bears upon the stepped wheel arrives at the lowermost end of a pivoted gravity arm 7 appertaining to a step 6 on the wheel, the rise on the cam wheel 8 engages the downwardly projecting nose 7 of said gravity arm 7 and rapidly lifts said arm and the pivoted arm 1.0 bearing upon same. This lifting move -ment, which is practically instantaneous, is

transmitted to the before-described stepped rod 13 which is pushed up within the slot 15 of bell-crank lever 15 so as to pivotally displace said lever and shog the extra guide bar appertaining to said lever rapidly to the extent of one gait. The number of gaits to be shogged in one direction is determined by the number of rises 6 and pivoted gravity members 7 on the before-mentioned gear wheel 4 and the number of steps 14 on the rod 13 operating the bell-crank lever 15.

The return or opposite shogging movement of the bar or bars is effected by providing the requisite number of suitably spaced and dimensioned falls 20 on the stepped gear wheel 4, said falls being perpendicular to the face of the wheel so as to effect an instantaneous movement of the bar or bars 17 under the action of suitable springs.

The mechanism above described may be somewhat modified or amplified so as to simultaneously shog a plurality of extra guide bars in different directions, and by so doing produce with the additional threads varied patterns such as squares or diamonds.

I claim:

1. In a plain net twist lace machine, a shogging mechanism for a thread guide bar, comprising a rotating stepped cam, a pivot'ed arm bearing upon the said cam, a stepped rod connected to said arm, and a bell crank lever one end of which is con nected with the said thread guide bar and the other end of which is engaged by the stepped portion of the rod, the engagement of the stepped rod with the lever serving to shog the thread guide bar as the rod is moved by the stepped cam. 2. In a plain net twist lace machine. a shogging mechanism for a guide adapted to carry a pattern thread, comprising a retating stepped cam, intermediate connections between the stepped cam and the thread guide bar by which said bar is shogged as the connections move from one step of the cam to another and supplemental means for quickly moving the engaging part of said connections from one step of the cam to another to insure rapid shogging movements.

3. In a twist lace machine, a shogging mechanism for a thread guide bar comprising a rotating stepped cam, connections ens gaging the cam for shogging the thread guide bar as they come into engagement with successive steps of the cam, pivoted arms located adjacent to the rises of the cam and rotatable with the cam, and means for moving the arms successively to cause them to lift the said operating connections from one step of the cam to another.

4. In a twist lace machine, a shogging mechanism for a guide bar adapted to carry a pattern thread, comprising in combination a stepped cam with rises in one section thereof and falls in another section, connections beween the said cam and the thread guide bar by which the latter is shogged, means for moving the cam and causing the connections to pass from one step to the next higher in succession to shog the thread guide bar in one direction. and a spring acting on the said connections to cause them to move over the falls of the cam and cause shogging of the thread guide bar in the opposite direction.

5. In a plain net machine and in combination with the shaft carrying the ordinary Inn motion cams which impart shogging movements to the thread guide bars employed in forming the net fabric, of an additional shogging mechanism for a thread guide bar adapted to carry a pattern thread, comprising a stepped cam for transmitting shogging movements to the thread guide bar for the pattern thread, the cam being in the form of a curved stepped member secured to the face of a wheel in gear with the shaft carrying the motion cams, and supplemental means operated from the said shaft for causing the uide bar for the pattern thread to be rapidly shogged as successive steps of the cam come into operation.

6. The combination stated in claim 5 when the supplemental means referred to are a series of pivoted arms arranged adjacent to the rises of the stepped cam, and an addi-- tional cam on the shaft carrying the motion cams arranged to act upon and move the said pivoted arms in succession.

7. A shogging mechanism for a thread guide of a twist lace machine, comprising a rotatable wheel on the face of which is secured a stepped cam, a lever bearing on the said cam and moved as it engages with the successive steps thereof, a stepped rod carried by the lever, and a bell crank, one end .of which is acted upon by the stepped rod for moving the lever and the other end of which is connected with the thread guide bar.

8. A shogging mechanism for a thread guide bar of a twist lace machine, comprising in combination a rotatable stepped cam, connect-ions for shogging the thread guide bar bearing upon the said cam and moved thereby, pivoted elements disposed adjacent to the rises of the cam arranged to act upon the connections that shog the thread guide bar,

and means actin upon the said pivoted elements in succession to quickly lift the connection from one level of the cam to the next higher. A

9. A vshogging mechanism for a thread guide bar of a twist lace machine, comprising in combination a rotatable stepped cam having in one portion a series of rises and in another portion a series of falls, connections for shogging the thread guide bar bearing upon the said cam and moved thereby, pivoted elements disposed adjacent to the rises of the cam arranged to act upon the connections that shog the thread guide bar, means acting upon the said pivoted elements in succession to quickly lift the connection from one level of the cam to the next higher, and a spring for holding the connections against the cam arranged'to cause the connections to descend the falls of the cam in succession.

10. In a shogging mechanism for a twist lace machine, the combination of a shaft, the ordinary motion cams carried lthereby, a gear wheel of small size also carried thereby, a gear wheel of larger size driven from the small gear wheel, a curved stepped cam secured to the face of the large'gear wheel, connections for shogging a bar adapted to guide a pattern thread, a set of levers pivotally supported upon the large gear wheel and arranged respectively adjacent to the rises of the stepped cam, and a cam on the shaft carrying the ordinary motion cams and the small gear wheel arranged to act upon the pivoted levers carried by the large I wheel in succession, and cause them to quick,-

ly lift the shogging connections for the thread guide bar from one level of the cam to the next higher in succession.

SAMUEL TOMLINSON HALL. 

